Back Fire Problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

twitch4187 · 10-14-2005, 08:34 PM

I bought a 68 Step Side while I was in Iraq and when I went home for leave I found out its a 327 ci a lil dissapointed but the problem I have is it started back firing after I changed the plugs to Bosh Platium plus4. Has anyone else had this problem or do you think my truck being that it wasnt driven often and when I drove the $hit out of it it might need the carb re adjusted or maybe jumped timing a lil bit?

ACES · 10-14-2005, 08:44 PM

Does it backfire and then die? or backfire all the time?
Any possibility that the plug wires were mixed up? (I only ask because I've done that before)

cst70rocket · 10-14-2005, 08:45 PM

Chances are you broke the porcelain on one or more of them, or they may have already been damaged before you got them. What's the rest of the ignition system? a stock coil and point dizzy may not have enough poop to fire that plug. Slap in a set of good ol ac's and try it again.
Kirk

jhwkns · 10-14-2005, 10:39 PM

Hopefully you just have a couple plug wires mixed up... If I were you I'd be happy it's a 327. Especially if the #'s match..

chevymaz · 10-14-2005, 10:50 PM

check the wires plugs 5 and 7 and make sure that they are not crossed.

cableguy0 · 10-14-2005, 11:14 PM

do yourself a favor and throw those pos plugs in the trashcan and next time save your money. it doesnt matter how many electrodes a plug has electricity takes the path of least resistance ie the quickest way to ground. those plugs are a gimmick and are probably the source of your problem. put some ac delco plugs in

cdowns · 10-14-2005, 11:19 PM

Quote:

Originally Posted by cableguy0

do yourself a favor and throw those pos plugs in the trashcan and next time save your money. it doesnt matter how many electrodes a plug has electricity takes the path of least resistance ie the quickest way to ground. those plugs are a gimmick and are probably the source of your problem. put some ac delco plugs in

twitch4187 · 10-17-2005, 07:38 PM

Thanks guys I'll give a call home and tell them what to check. This being deployed stuff aint too bad I ask you guys for info and then call home and tell them what to do. I'm fixing my truck without even getting dirty.

**VetteVet** · 10-17-2005, 07:55 PM

Quote:

Originally Posted by twitch4187

Thanks guys I'll give a call home and tell them what to check. This being deployed stuff aint too bad I ask you guys for info and then call home and tell them what to do. I'm fixing my truck without even getting dirty.

Yeah and you get to look like the expert. LOL
Where are you deployed to? I missed the first post.

twitch4187 · 10-17-2005, 09:09 PM

I've been deployed to Iraq for about 10 months now. I dont get to look like the expert trust me I let them know where I get the info from.

**VetteVet** · 10-17-2005, 11:47 PM

Quote:

Originally Posted by twitch4187

I've been deployed to Iraq for about 10 months now. I dont get to look like the expert trust me I let them know where I get the info from.

I was in Kuwait for six months during Iraqi Freedom crewing an a-10. It sucked so I hope you get home soon. Watch your back and we're praying for all you guys.

djracer · 10-18-2005, 12:21 AM

and gals!

10-14-2005, 08:34 PM	#1
twitch4187 Registered User Join Date: Apr 2005 Posts: 23	Back Fire Problem I bought a 68 Step Side while I was in Iraq and when I went home for leave I found out its a 327 ci a lil dissapointed but the problem I have is it started back firing after I changed the plugs to Bosh Platium plus4. Has anyone else had this problem or do you think my truck being that it wasnt driven often and when I drove the $hit out of it it might need the carb re adjusted or maybe jumped timing a lil bit?

10-14-2005, 08:44 PM	#2
ACES Life is a gamble Join Date: Oct 2003 Location: Lee's Summit, MO Posts: 796	Does it backfire and then die? or backfire all the time? Any possibility that the plug wires were mixed up? (I only ask because I've done that before) __________________ 1970 Orange CST C-10 w/350, posi, Longbed The torpid artist seeks inspiration at any cost, by virtue or by vice, by friend or by fiend, by prayer or by wine. -- Ralph Waldo Emerson Last edited by ACES; 10-14-2005 at 08:44 PM.

10-14-2005, 10:39 PM	#4
jhwkns Registered Cruiser Join Date: May 2002 Location: Las Vegas NV Posts: 2,230	Hopefully you just have a couple plug wires mixed up... If I were you I'd be happy it's a 327. Especially if the #'s match.. __________________ I intend to live forever. So far, so good.

10-14-2005, 10:50 PM	#5
chevymaz What are you looking at? Join Date: Jul 2003 Location: Kellyville,Oklahoma Posts: 308	check the wires plugs 5 and 7 and make sure that they are not crossed. __________________ 1971 GMC LWB 2005 Honda Element 2007 Honda Fit

10-14-2005, 11:14 PM	#6
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	do yourself a favor and throw those pos plugs in the trashcan and next time save your money. it doesnt matter how many electrodes a plug has electricity takes the path of least resistance ie the quickest way to ground. those plugs are a gimmick and are probably the source of your problem. put some ac delco plugs in __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-14-2005, 08:45 PM	#3
cst70rocket Registered User Join Date: Sep 2005 Location: San Angelo or Eufaula Posts: 301	Chances are you broke the porcelain on one or more of them, or they may have already been damaged before you got them. What's the rest of the ignition system? a stock coil and point dizzy may not have enough poop to fire that plug. Slap in a set of good ol ac's and try it again. Kirk

10-17-2005, 07:38 PM	#8
twitch4187 Registered User Join Date: Apr 2005 Posts: 23	Re: Back Fire Problem Thanks guys I'll give a call home and tell them what to check. This being deployed stuff aint too bad I ask you guys for info and then call home and tell them what to do. I'm fixing my truck without even getting dirty.

10-17-2005, 09:09 PM	#10
twitch4187 Registered User Join Date: Apr 2005 Posts: 23	Re: Back Fire Problem I've been deployed to Iraq for about 10 months now. I dont get to look like the expert trust me I let them know where I get the info from.

10-18-2005, 12:21 AM	#12
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: Back Fire Problem and gals! __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!



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